You get a rough guide from the type name. Annuals flower the same year. Biennials flower the year after sowing. Perennials may take anything from a few months to many years to flower from seed.
Seed packets usually give more specific information, or you can look up the particular plant on the RHS website. Veg seed packets generally show time till harvest.
The problem is the many and varied conditions. Last night, for example, some people were hoicking in their tenders due to frost forecast and the Cornishman was in shorts and sunglasses!
Posts
It's all so variable it would be difficult to make a list.
In the sticks near Peterborough
You get a rough guide from the type name. Annuals flower the same year. Biennials flower the year after sowing. Perennials may take anything from a few months to many years to flower from seed.
Seed packets usually give more specific information, or you can look up the particular plant on the RHS website. Veg seed packets generally show time till harvest.
You could start one
The problem is the many and varied conditions. Last night, for example, some people were hoicking in their tenders due to frost forecast and the Cornishman was in shorts and sunglasses!